Email APIs · side by side
AgentMail vs Robotomail
Compare AgentMail, Robotomail by sending volume, delivery webhooks, inbound email, domain limits and retention.
Email APIs pricing calculator
50
AgentMail
Custom / not listed
Custom / unlisted usage pricing · 50 inboxes
Robotomail
Custom / not listed
Custom / unlisted usage pricing · 50 inboxes
Listed USD plan fees and tracked usage only. Unlisted compute, transfer, extras, taxes and contract terms are excluded. Custom or unsupported plan usage is not estimated.
Email APIs overview & pricing
| Email APIs | AgentMail | Robotomail |
|---|---|---|
| Provider | AgentMail | Robotomail |
| Billing unit | inboxes | inboxes |
| Plan at selected usage | Custom / unlisted usage pricing | Custom / unlisted usage pricing |
| Monthly estimate | Custom / not listed | Custom / not listed |
| Workload | 50 inboxes | 50 inboxes |
| Free access | Developer access varies | Developer access varies |
| Published plans | Not listed | Free, Starter, Growth, Scale |
| Prices checked | Not listed | 2026-10-08 |
Provider
- AgentMail
- AgentMail
- Robotomail
- Robotomail
Billing unit
- AgentMail
- inboxes
- Robotomail
- inboxes
Plan at selected usage
- AgentMail
- Custom / unlisted usage pricing
- Robotomail
- Custom / unlisted usage pricing
Monthly estimate
- AgentMail
- Custom / not listed
- Robotomail
- Custom / not listed
Workload
- AgentMail
- 50 inboxes
- Robotomail
- 50 inboxes
Free access
- AgentMail
- Developer access varies
- Robotomail
- Developer access varies
Published plans
- AgentMail
- Not listed
- Robotomail
- Free, Starter, Growth, Scale
Prices checked
- AgentMail
- Not listed
- Robotomail
- 2026-10-08
Email APIs monthly cost
AgentMail: Not pricedRobotomail: Not priced
Cost by inboxes
Cost curve data
| inboxes | AgentMail | Robotomail |
|---|---|---|
| 0 | Not priced | $0 |
| 13 | Not priced | Not priced |
| 25 | Not priced | Not priced |
| 50 | Not priced | Not priced |
| 100 | Not priced | Not priced |
| 250 | Not priced | Not priced |
| 500 | Not priced | Not priced |
0
- AgentMail
- Not priced
- Robotomail
- $0
13
- AgentMail
- Not priced
- Robotomail
- Not priced
25
- AgentMail
- Not priced
- Robotomail
- Not priced
50
- AgentMail
- Not priced
- Robotomail
- Not priced
100
- AgentMail
- Not priced
- Robotomail
- Not priced
250
- AgentMail
- Not priced
- Robotomail
- Not priced
500
- AgentMail
- Not priced
- Robotomail
- Not priced
Email APIs feature comparison
| Email APIs | AgentMail | Robotomail |
|---|---|---|
| Sending methods | Not listed | Not listed |
| Inbound processing | Not listed | Not listed |
| Sending domains | Not listed | Not listed |
| Activity retention | Not listed | Not listed |
| Webhooks & events | Not listed | Not listed |
| Dedicated IP | Not listed | Not listed |
| Single sign-on | Not listed | Not listed |
| Support | Not listed | Not listed |
| Mailboxes | Not listed | Not listed |
| Monthly sending per mailbox | Not listed | Not listed |
| Daily per mailbox | Not listed | Not listed |
| Monthly inbound | Not listed | Not listed |
| Custom domains | Not listed | Not listed |
| Storage | Not listed | Not listed |
| Webhooks | Not listed | Not listed |
| SSE streaming | Not listed | Not listed |
| Dedicated IPs | Not listed | Not listed |
| MCP, CLI & API access | Not listed | Not listed |
Sending methods
- AgentMail
- Not listed
- Robotomail
- Not listed
Inbound processing
- AgentMail
- Not listed
- Robotomail
- Not listed
Sending domains
- AgentMail
- Not listed
- Robotomail
- Not listed
Activity retention
- AgentMail
- Not listed
- Robotomail
- Not listed
Webhooks & events
- AgentMail
- Not listed
- Robotomail
- Not listed
Dedicated IP
- AgentMail
- Not listed
- Robotomail
- Not listed
Single sign-on
- AgentMail
- Not listed
- Robotomail
- Not listed
Support
- AgentMail
- Not listed
- Robotomail
- Not listed
Mailboxes
- AgentMail
- Not listed
- Robotomail
- Not listed
Monthly sending per mailbox
- AgentMail
- Not listed
- Robotomail
- Not listed
Daily per mailbox
- AgentMail
- Not listed
- Robotomail
- Not listed
Monthly inbound
- AgentMail
- Not listed
- Robotomail
- Not listed
Custom domains
- AgentMail
- Not listed
- Robotomail
- Not listed
Storage
- AgentMail
- Not listed
- Robotomail
- Not listed
Webhooks
- AgentMail
- Not listed
- Robotomail
- Not listed
SSE streaming
- AgentMail
- Not listed
- Robotomail
- Not listed
Dedicated IPs
- AgentMail
- Not listed
- Robotomail
- Not listed
MCP, CLI & API access
- AgentMail
- Not listed
- Robotomail
- Not listed
Showing 15 of 18
Which email providers fit your needs?
Robotomail features & plan notes
- Multi-tenant inboxes
- Event streaming
- Conversation threads
How to compare email providers
Separate transactional delivery from campaigns, outreach and agent inboxes. Compare monthly sends and daily caps; contacts, seats and inboxes are not sending allowances. Budget separately for dedicated IPs, validation and attachments.
Browse Email APIs pricing